Grease the bottom of an 8 x 8 inch square pan with butter or non stick spray. You could also line the pan with parchment paper or aluminium foil. Preheat oven to 180 C .

Chop up the oreos. You could keep them as big as you want. I chopped each cookie into 4 quarters . Keep aside

In a medium saucepan , melt together the butter and chocolate (both chopped to small pieces).

Mix in the sugar .

Mix in the eggs , ONE BY ONE , until each is properly incorporated.

Mix in the vanilla.

Add the flour and salt , and mix in until you cant see the flour anymore.

Fold in the chopped oreos.

Pour batter into the prepared pan. Bake at 180 C for 28-30 minutes. A tooth pick inserted in the centre will come out with a few moist crumbs .

Cool completely in pan for atleast an hour before slicing.